These days, Fitbits and Jawbones adorn arms the way watches once did.
And for good reason: Wearable technology can log the steps you take in a day, track heart rate during workouts and help you get better sleep.
All of these positive lifestyle changes may cause people to assume that the devices will also help them lose weight. That’s a reasonable assumption, but there is actually very little evidence that fitness trackers, alone, will lead to weight loss.
“Many new technologies, and dietary supplements and new diets, are sold to the public with little actual research behind them. Wearable technology to encourage fitness is no different,” Aaron E. Carroll recently wrote in The New York Times, pointing to a study first reported on last year.